Quiz about Elements, Compounds and Mixtures

Question 1

Diamonds (C) and Uranium (U) are examples of:

Accepted Answer

elements

Answer

mixtures

Answer

compounds

Question 2

Is sugar (C₁₂H₂₂O₁₁)an element, compound or a mixture?

Accepted Answer

Compound

Answer

Element

Answer

mixture

Question 3

How many atoms of each element are present in a molecule of H₂SO₄?

Accepted Answer

2 hydrogen, 1 sulfur, 4 oxygen

Answer

1 hydrogen, 2 sulfur, 4 oxygen

Answer

2 hydrogen & 4 sodium

Answer

1 hydrogen & 6 sodium

Question 4

An element is made up of only one kind of _____.

Accepted Answer

atom

Answer

isotope

Answer

compound

Answer

metal

Question 5

Classify the picture with the correct label.

Accepted Answer

Compound

Answer

Element

Answer

Mixture of Elements

Answer

Mixture of Compounds

Question 6

Classify the picture with the correct label.

Accepted Answer

Mixture of Elements

Answer

Element

Answer

Compound

Answer

Mixture of Elements and Compounds

Question 7

Classify the picture with the correct label.

Accepted Answer

Mixture of an Element & a Compound

Answer

Element

Answer

Compound

Answer

Mixture of Compounds

Question 8

Classify the picture with the correct label.

Accepted Answer

Mixture of Compounds

Answer

Compounds

Answer

Mixture of Elements

Answer

Mixture of Elements & Compounds

Question 9

Classify the picture with the correct label.

Accepted Answer

Mixture of Compounds

Answer

Mixture of Elements

Answer

Compound

Answer

Element

Question 10

Classify the picture with the correct label.

Accepted Answer

Compound

Answer

Element

Answer

Mixture of Compounds

Answer

Mixture of Elements

Question 11

Classify the picture with the correct label.

Accepted Answer

Mixture of Compounds

Answer

Mixture of Elements

Answer

Compound

Answer

Mixture of Elements & Compounds

Question 12

This diagram represents a _____.

Accepted Answer

mixture of elements

Answer

pure substance that is a compound

Answer

pure substance that is an element

Answer

mixture of compounds

Question 13

Which of the following represents an element?

Accepted Answer

H2

Answer

H2O

Answer

NaCl

Answer

CaCO3

Question 14

Which of the following is NOT a compound?

Accepted Answer

F2

Answer

HCl

Answer

NaCl

Answer

CO2

Question 15

Salt has a chemical formula of NaCl.  Salt is a...

Accepted Answer

Compound

Answer

Element

Answer

Mixture

Answer

None of the Above

Question 16

A(n) ____________ is a substance that is formed when two or more different elements chemically combine to form a new substance.

Accepted Answer

Compound

Answer

Element

Answer

Mixture

Answer

Solids

Question 17

Which of the following substances cannot be broken down into a simpler substances?

Accepted Answer

Element

Answer

Compound

Answer

Mixture

Answer

Solids

Question 18

How many elements are present in the compound Na₂CO₃?

Accepted Answer

3

Answer

1

Answer

2

Answer

4

Question 19

A combination of substances that are not chemically combined is called a(n)____________.

Accepted Answer

mixture

Answer

compound

Answer

element

Answer

none of the above

Question 20

This picture represents which of the following?

Accepted Answer

mixture

Answer

element

Answer

compound

Question 21

This picture represents which of the following?

Accepted Answer

element

Answer

compound

Answer

mixture

Question 22

Which of the following is an example of a compound?

Accepted Answer

H2O2

Answer

N2

Answer

O2

Answer

Cu

Question 23

Beatriz wants to make a mixture out of her bowl of blueberries. Which of the following would turn her bowl of blueberries into a heterogeneous mixture?

Accepted Answer

adding raspberries to the bowl

Answer

adding more blueberries to the bowl

Answer

cutting up the blueberries

Answer

mashing the blueberries

Question 24

Humans take in oxygen from the air they breathe in and exhale carbon dioxide gas, CO2. Carbon dioxide gas is _____.

Accepted Answer

a compound made up of carbon and oxygen atoms.

Answer

an element made up of carbon and oxygen atoms.

Answer

a solution made up of carbon and oxygen atoms.

Answer

a mixture of carbon and oxygen atoms.

Question 25

Sam's mother is cooking breakfast in a cast-iron frying pan. If the pan is made only of iron, what can Sam conclude?

Accepted Answer

The pan is a pure substance with the chemical symbol Fe.

Answer

The pan is a pure substance with the chemical symbol Ir.

Answer

The pan is a pure substance with the chemical symbol I.

Answer

The pan is a pure substance with the chemical symbol F.

Question 26

The substances present in a mixture always retain their ______.

Accepted Answer

physical and chemical properties

Answer

smell properties

Answer

shape

Answer

color

Question 27

In a ______________mixture the components are evenly distributed throughout the mixture and only one phase of matter is present.

Accepted Answer

homogeneous mixtures

Answer

heterogeneous mixtures

Answer

mixed mixtures

Question 28

In a ______________mixture the components of the mixture are NOT evenly distributed and more than one phase of matter can be present.

Accepted Answer

heterogeneous

Answer

homogeneous

Answer

solution

Answer

water

Question 29

Milk is an example of a ________.

Accepted Answer

mixture

Answer

compound

Answer

element

Question 30

Carbon is an example of a(n) _______________.

Accepted Answer

element

Answer

compound

Answer

mixture

Question 31

You are eating a bowl of trail mix. What type of mixture are you consuming?

Accepted Answer

heterogeneous

Answer

homogeneous

Answer

pure substance

Answer

compound

Question 32

Italian Salad Dressing is an example of a ________.

Accepted Answer

heterogeneous mixture

Answer

homogeneous mixture

Answer

pure substance

Answer

compound

Question 33

Of these mixtures, which one is a solution?

Accepted Answer

D

Answer

A

Answer

B

Answer

C

Question 34

Which of the following is a pure substance that cannot be broken down into other substances by chemical or physical means?

Accepted Answer

element

Answer

compound

Answer

atom

Answer

mixture

Question 35

Sugar water is an example of a __________.

Accepted Answer

homogeneous solution

Answer

suspension

Answer

colloid

Answer

compound

Question 36

A mixture made of parts that separate upon standing is what type of mixture?

Accepted Answer

suspension

Answer

solution

Answer

alloy

Answer

colloid

Question 37

Which of the following is an example of the formation of a mixture?

Accepted Answer

Sugar crystals dissolving in water.

Answer

Rust forming on an iron nail.

Answer

Sodium and chlorine forming table salt.

Answer

Hydrogen gas and oxygen gas reacting to produce water

Question 38

Which statement identifies why oxygen is classified as a pure substance and air is classified as a mixture?

Accepted Answer

Oxygen contains only one substance, but air contains several substances.

Answer

Oxygen is more reactive than air.

Answer

Oxygen has a higher density than air.

Answer

Oxygen goes under a phase change, whereas air is always a gas.

Question 39

Which of the following is an example of of a container filled with a pure substance rather than with a mixture?

Accepted Answer

A balloon filled with helium.

Answer

A tire filled with air.

Answer

A jar filled with salt water.

Answer

A glass filled with chocolate milk.

Question 40

When electricity passes through water, hydrogen and oxygen are produced. Which table correctly labels the compounds and elements involved in the process?

Accepted Answer

Water--->Compound

Hydrogen--->Element

Oxygen--->Element

Answer

Water-->Compound

Hydrogen-->Compound

Oxygen--->Element

Answer

Water-->Compound

Hydrogen--->Element

Oxygen--->Compound

Answer

Water-->Element

Hydrogen--->Element

Oxygen--->Element

Question 41

The chemical equation shown below represents a reaction that produces fuel for certain cars.

CO + H₂O------->CO₂+ H₂

_{Which substance in this equation is classified as an element?}

Accepted Answer

H2

Answer

CO

Answer

H2O

Answer

CO2

Question 42

Water (H₂O), is not found on the periodic table because water is a...

Accepted Answer

compound

Answer

atom

Answer

liquid

Answer

mixture

Question 43

Oxygen and iron combine chemically to form rust. Rust is classified as which of the following?

Accepted Answer

a compound.

Answer

an atom.

Answer

an element.

Answer

a mixture.

Question 44

The image below is an example of

Accepted Answer

a homogeneous mixture

Answer

an atom

Answer

a molecule

Answer

a heterogeneous mixture

Question 45

The image below is an example of

Accepted Answer

a heterogeneous mixture

Answer

a homogeneous mixture

Answer

a compound

Answer

an element

Question 46

Which of the following boxes contains a pure substance? Choose all correct answers!

Accepted Answer

A

Accepted Answer

B

Accepted Answer

C

Answer

D

Question 47

Which of the following boxes contains a solution? Choose all correct answers!

Accepted Answer

B

Answer

A

Answer

None are solutions

Question 48

Which of the following boxes contains a mixture? Choose all correct answers!

Accepted Answer

A

Accepted Answer

B

Question 49

Which of the following boxes contains a pure substance? Choose all of the correct answers!

Accepted Answer

A

Accepted Answer

B

Answer

C

Answer

D

Question 50

Which of the following boxes contains only elements?

Accepted Answer

C

Answer

A

Answer

B

Answer

D

Question 51

Chicken noodle soup is an example of a ________.

Accepted Answer

Heterogeneous mixture

Answer

Homogeneous mixture

Question 52

Vinegar is an example of a ______________.

Accepted Answer

Homogeneous mixture

Answer

Heterogeneous mixture

Question 53

A bottle of dishwashing detergent contains a clear, viscous liquid. The label has a long list of ingredients, including water, sodium lauryl sulfate, fragrance, and Blue dye #5.

What can you infer about the material in the bottle from this label and the appearance of the liquid?

Accepted Answer

It is a homogeneous mixture.

Answer

It is a pure substance.

Answer

It is a compound.

Answer

It is a heterogeneous mixture.

Question 54

A 14-karat gold ring consists of 14 parts gold and 10 parts copper. This alloy can be separated by density when melted. Which type of matter is the 14-karat gold ring?

Accepted Answer

Homogeneous Mixture

Answer

Compound

Answer

Pure Substance

Answer

Heterogeneous Mixture

Question 55

Which of the following is an example of a container filled with a pure substance?

Accepted Answer

a balloon filled with helium

Answer

a glass of iced tea

Answer

a bucket of salt water

Answer

a tire filled with air

Question 56

Which of the following is an example of a homogeneous mixture?

Accepted Answer

Lemonade

Answer

granite

Answer

dirt

Answer

salsa

Question 57

Fruit salad is an example of a _____________ mixture.

Accepted Answer

heterogeneous

Answer

homogeneous

Question 58

Shampoo is an example of a _____________ mixture.

Accepted Answer

homogeneous

Answer

heterogeneous

Question 59

A peanut M&M is an example of a _____________ mixture.

Accepted Answer

heterogeneous

Answer

homogeneous

Question 60

Honey is an example of a _____________ mixture.

Accepted Answer

homogeneous

Answer

heterogeneous

Question 61

Alex goes into the garden and digs up a shovel full of dirt. Dirt is an example of a _____________ mixture.

Accepted Answer

Heterogenous

Answer

Homogeneous

Question 62

A magnet was placed near a pile that contained both iron and sulfur. The magnet was moved gradually closer to the pile. As it neared the pile, the magnet started attracting small pieces of iron from the pile.

Which of these statements best describes the contents of the pile?

Accepted Answer

It is a heterogeneous mixture of iron and sulfur that can be separated by magnetism.

Answer

It is a solution of iron and sulfur that can be separated by magnetism.

Answer

It is a compound of iron and sulfur that can be separated by magnetism.

Answer

It is a suspension of sulfur in iron that can be separated by magnetism.

Question 63

Blood is a fluid found in the bodies of humans and other animals. It can be physically separated into plasma, red blood cells and white blood cells. Therefore, blood is a ___________________.

Accepted Answer

mixture

Answer

pure substance

Answer

element

Question 64

Cereal with milk is an example of a _____________.

Accepted Answer

Heterogeneous mixture

Answer

Homogeneous mixture

Elements, Compounds and Mixtures

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